OnePlus 3T, it's still good enough to beat other competitor out of water. It's been exact 2 years since it's release and I have yet to experience any slowdown whatsoever
No one knows what thefutureholds, that's why itspotential is infinite
Right now my favorite mobile is Xiaomi Redmi Note 5 Pro, which i don't own it for now but i hope to buy soon. I am using Xiaomi Redmi Note 4 and really satisfied with it.
It may not be better than iPhone X in specs, but iPhone 8 Plus price is more reasonable and I also like its physical home button. In addition, I do not want to play with FaceID at all.